Writing instrument



FIG. 1 is a perspective view of the writing instrument of the present invention;

FIG. 2 is a bottom view of the writing instrument of the present invention;

FIG. 3 is a top view of the writing instrument of the present invention; and,

FIG. 4 is a side view of the writing instrument of the present invention as shown in FIG. 1. 

The ornamental design for a writing instrument, as shown. 